Automatic impulse starting apparatus



H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN 22, I919.

1,400,581. Patented 20, 1921.

4 SHEETSSHEET l.

' m VENTOR fit'NRY T/EDEMHNN ,4 TTORNE Y H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS. APPLICATION ,HYLED JAN. 22, 1919.

1,400,581. Patented Dec. 20, 1921.

4 SHEETSSHEET 2.

IN VE N TUR HENRY T/EDEMHNN A TTORNEY H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN-22.19I9.

1,400,581, Patented Dec. 20, 1921.

4 SHEE"SSHEET 3.

m/ VL'A/ 70/? HEN KY T/EDEMHNN A TTOR/VEY H. TIEDEM ANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN. 22. 1919.

1,400,581, Patentd Dec. 20, 1921.

4 SHEETS-SHEET 4.

I INVENTDR HENRY WEDEMHNN ATTORNEY UNITED STATES PATENT OFFICE.

' HENRY TIEDEMANN, OF NEW JERSEY, ASSIGNOR T0 SPLITDORF ELEC- TRICALCOMPANY, OF NEWARK, NEW JERSEY.

AUTOMATIC IMPULSE STARTING APPARATUS.

Specification of Letters Patent. Patented Dec, 20 1921 Application filedJanuary 22, 1919. Serial No. 272,529.

is the time for firing the engine. This low rotative speed isdetrimental to getting a good spark from an ignition generator of themagneto type.

- It is the object of my invention toprovide means for accelerating therotative element of the generator not only at the time of the initialstarting of the engine but at all speeds below a predetermined value.

Another object of my invention is to pro vide a simple and cheapinclosing means for the impulse devices used in connection with myinvention, so that they will not be exposed to dust, dirt, water andother objec, tionable matter tending to interfere with the operation.

Another object of my invention is to pro vide easy means for removingthe impulse device from the rotative element of the ignition generator.

In the application of my invention to a magneto, I have chosen toillustrate it in connection with a magneto of the Dixie type, such asillustrated in U. S. Letters Patent #1,126,676, issued January 26, 1915,although it will be understood that the invention may be applied toother types of ignition generators.

In the drawings, Figure 1 is a side view of the magneto showing theinclosing end plate,

but with a portion of one of the side covers broken away to show certaindetails.

Fig. 2 is an end view of Fig.- 1, showing the impulse devices in oneposition of operation, the cover plate being removed.

Fig. 3 is a view similar to Fig. 2 but with the impulse devices in adifferent position of operation.

Fig. 4 is a view of the driven member carried by the rotating element ofthe ignition generator. crating means in position within the drivenmember.

Fig. 5 is a her, while Fi 6 is a view of the driving member on the hue6-6 of Fig. 5, without the cover ring shown in Fig. 7.

Fig. 7 is an end view of the cover ring used in connection with thedriving member plan view of the driving memshown in Fig. 5.

Fig. 8 is a section on the line 8-8 of ig. 9 is an inside view of thecover plate used in connection with the end plate shown in connectionwith Figs. 1, 2 and 3.

Fig. 10 is a section on the line 10-10 of Fig. 9, but with the frictionmaterial removed.

Fig. 11 is a bottom view of the in Figs. 2 and 3.

Fig. 12 is an end view of an ignition generator similar to that shown inFig. 1 but with a somewhat different tripping mechapawl shown nism.

.Fig. 13 is a view similar to Fig. 12 but with the apparatus in adifierent position of operation.

Fig. 14 is.a side view of the pawls shown in Figs. 12 and 13, while Fig.15 is a view of Fig. 14 looking from right to left.

Referring now to the details, wherein like numbers refer tocorresponding parts in the various views, 1 is a magneto having a base 2to which an end plate 3 is adapted to be fastened as by screws 4. Adriven member 5 is adapted to be fastened to the shaft of the rotatingelement as by keyway 6 and other means to be later described.Accelerating means, in the form of a spring, 7, is carried by the member5. One end of the spring 7 abuts against the stud 8, fastened to themember 5, while the other end abuts against the stud 9 carried by thedriving member 10, that is supported on the driven member 5 by means ofthe riin 11 on the member 5 and the flange 12 on the driving member 10.A bufl'er spring 13 is carried between the studs 8 and 9. The 'drivingmember 10 is machined so as to have two flanges 14 and 15 with anannularspace therebetween. Mounted within this'annular This view also shows theaccel- Space, as by the pivot 16, is a member'17 having a nose 18 thatis adapted, during. a part of the revolution of the driv'in member 10,to protrude beyond the perlpheral surface thereof. I referably use acover plate to fit between the flanges 14 and 15, in the shape of a snapring 19, which is notched out at 20, which notches engage. the pins 21on the driving member 10 to hold the member 19 in position. This coverplate serves a duel function of excluding dirt, dust, oil and water fromthe member 17 and also prevents the member from flying beyond theconfines of the driving member. While, in the ordinary use of thedevice, the abutment on the member 17 opposite to the nose 18 thereofwill prevent any such outward movement, yet in time this abutment maywear down so that the cover plate 19 has to be relied upon to retain themember 17 within its housing. When the member 19 is assembled on thedriving member 10, the ends 22 and 23 take the position illustrated inFig. that is to say, they leave an opening through which. the nose 18can protrude. The driving and driven members are held in operativeposition on the shaft. of the rotating element by the nut 24 in theusual and well known manner. g

The end plate 3 has its side walls extends ing outwardly around thedriving and driven member forming a housing therefor, the end of thehousing being closed in by a cover 25 held to the end plate by screwspassing through the holes 26. The cover 25 is grooved out at 27 andcarries within this groove a material 28, such as a good grade of feltthat engages the periphery of the driving member thereby closmg theopening into the housing to effectually prevent the entrance of dust,dirt, water and other foreign material. The flange 29 on the cover fitsclosely within the rim 30 thereby effectually closing the opening intothe housin containin the impulse devices.

ounted within the housing of the end plate is a restraining device inthe shape of a pawl 31 having a nose 32 adapted to engage notches 33 inthe driven member 5. The pawl 31 has cars 34 to which is attached anoperating lever 35 adapted to be positioned by resilient member 36. Pawl31 also has attached thereto a finger 37 that is adapted to be engagedby the nose 18 of member 17.

The operation of my device so far as the driving and driven members areconcerned, is similar to that shown and described ,in Patent #1,226,933,issued May 22, 1917, to Fred B. Williams, so it will be only referred tobriefly herein. When it is desired to utilize the impulse devices thelever 35 is operated to dropthe pawl 31 so the nose 32 engages one ofthe notches 33 in the driven member 5. This. re t ains t e mem er 5 fromturning and energy is stored in the spring 7 until one of the cams 38 onthe driving member 10 engages the surface 39 on the nose 32 of the pawl31, thereby lifting the nose 32 out of engagement with the notch 33whereupon the driven member and the rotating element of the generator,to which it is attached, are rapidly turned to their normal position,producing a strong spark in the generator. When the speed of the enginehas reached a predetermined value the blows on the nose 32 will throwthe pawl to the inoperative position, shown in Fig. 2. What has justbeen said above, is descriptive of the manual operation of the pawlwhich is advantageously used when the ignition generator carrying theimpulse de-' vices are first installed, at which time it is necessary totime the engine properly with the ignition generator. I

Instead of utilizing the manual control I prefer to use an automaticcontrol which will now be described. In vturnin the engine overslowlythe member 17 durmg a portion of the revolution will take theposition shown in Fig. 2 in which the nose 18 will project through theopening provided in the manner heretofore described and the nose 18 willengage the finger 37 thereby trippin .the pawl to the position shown inFig. 3 aIter which the current impulses will be obtained in the mannerpreviously described.

As the engine speeds up the member 17 which is responsive to centrifugalforce. will move about the pivot 16 so that the nose 18 will bewithdrawn out of the path of engagement with the finger 37, but if forany reason the speed of the engine falls to a predetermined value thenose 18 will be projected so as to engage the finger 37 and thegenerator will automatically begin to deliver augmented sparks, due tothe accelcrating means. i

In F igs. 12, 13, 14 and 15, I have shown an arrangement in which theimpulse and tripping mechanism are-not inclosed, except however, in thisopen type of construction I prefer to use the inclosure for the member17 as already described.

From the above description of, the automatic tripping arrangementcarried by the driving member, it w1ll be seen that a very rugged andsubstantial construction is ob tained and which construction is a greatimprovement over the arrangement shown and described in Hermann, PatentNo. 1,318,206, issued October 7, 1919, wherein, due to the nature of thesaid construction the parts must of necessity be rather frailon accountof the limited space Within which they are designed to operate.

Byextendlng the side walls of the end plate 3 outwardly to form ahousing around the implse devices, means must be provided to remove thedrivi g and d iven member from the rotatin element after the nut 24 hasbeen remove and, I have overcome this difliculty by providing openingsin the side walls of the plate 3, which openings are closed by anysuitable means, such as plugs 40, which are readily removable so that atool may be inserted from either or both sides of the generator, inbehind the driven member 5 to forceit and the driving member 10 off theshaft of the. rotating element.

In order to facilitate the removal of the nut 24, I prefer to use ashort pin 41 which extends to the rear of the driven member 5 so thatthis can be engaged with the tool either when the .parts are inclosed,as in Fig. 1, or when the open type is used, as in Figs. 12 and 13,whereby the rotating element can be held and the nut 24: removedregardless of whether the threadon the end of the shaft is right or lefthanded, or whether or not the impulse devices are made for right or lefthand rotation.

While I have shown and described a preferred form of my invention, itwill be understood by one skilled in the art that numerous changes canbe made in the details without departing from the spirit of theinvention and the scope of the appended claims.

Having thus described my invention, what I claim is 1. In a device ofthe class described, the combination with the rotor of a magneto having.a driven member attached thereto, of a drivin member for actuating thesame.

. acceleratlng means associated with said driven member and connectingthe same to said driving member, devices in proximity to said drivenmember fpr restraining the same, means for holding said devices innon-restraining position, means carried by said driving member forthrowing said devices to restraining position and means for w releasingsaid devlces to permit the accelerating means to actuate the rotor. 2.In a device of the class described, th

- combination with the rotor of a magneto having a driven memberattached thereto, of a driving member for actuating the same, connectingmeans interposed between said driving and driven members includingspring, devices carried on the end plate of the magneto but normallyinoperative for restraining the movement of the driven member, meanscarried by the driving member for automatically tripping on starting orwhen the rotor speed falls below a' predetermined value said restrainingdevices into position to restrain the driven member whereby energy isstored in said spring, means operated by the driving member forreleasing and throwing-to inoperative position said restraining devicesto allow the stored energy in the spring to impart an impulse to thedriven member and rotor,

and means for holding the restraining devices in ino erative positionuntil tripped again by sai tripping means.

3. In a device of the class described, the combination with the rotorshaft of an ignition generator and a driving member for actuating thesame, connecting means interposed between said rotor shaft and drivingmember including a spring, devices for restraining the movement of therotor shaft for compressing and storing power in said spring and meansfor releasing said restraining devices whereby said spring may propelthe rotor shaft momentarily at a greater speed than the driving member,and means carried by the driving member for automatically tripping saidrestraining devices into operative position when the rotor shaft isturned below a predetermined speed.

4. In a device of the class described, the combination with the rotorshaft of an ignition generator and a driving member for actuating thesame, connecting means interposed'between said rotor shaft and drivingmember'including a spring, devices for restraining the movement of therotor shaft for compressing and storing power in said spring and meansfor releasing said restraining devices whereby said spring may propelthe rotor shaft momentarily at a greater speed than the driving member,and

.a member so constructed and pivoted on the for compressing and storingpower in said spring and means for releasing said restraining deviceswhereby said spring may propel the rotor shaft momentarily at a greaterspeed than the driving member, said driving member having two flangeswith an annular space therebetween and a member pivotally mounted insaid space between theflanges, said member having a nose protrudingbeyond the periphery of said flanges at a speed below a predeterminedvalue whereby the said nose will engage and trip said restrainingdevices into operative position.

6. In a device of the class described, the combination with the rotorshaft of an ignition generator and a driving member for actuating thesame, connectin means interposed between said rotor sha t and drivingmember including a spring, devices for restraining the movement of therotor shaft a housing around sai for compressing and storing power insaid spring and means for releasing said restraining devices wherebysaid spring may propel the rotor shaft momentarily at a greater speedthan the driving member, said driving member having two flanges with anannular space therebetween and a member pivotally mounted in said spacebetween the flanges, said member having a nose protruding beyondthe'periphery of said flanges at a speed below a predetermined valuewhereby the said nose will engage and trip said restraining devices intooperative position, and a cover for said annular space fitting betweensaid flanges to inclose all of the pivoted member except the nosethereof.

7 In a device of the class described, the combination with the rotor ofa magneto having a driven member attached thereto, of a driving memberfor actuating the same, accelerating means associated with said drivenmember and connecting the same to said driving member, a pawl pivoted onthe framework of the generator for restraining the movement of the rotorshaft for compressing and storing power in said spring, said pawl havingmeans associated therewith for holding it in neutral position and afinger attached thereto extending toward said drivin member, a memberresponsive to centrifugal force carried by the driving member and havinga part adapted to protrude outwardly to engage the finger on said pawlto trip the same for restraining said rotor shaft when the drivingmember is rotated below a certain speed, and means operated by thedriving member for releasing said pawl so that the said spring mayimpart a sudden movement to the rotor shaft.

8. In a device of the class described, the combination with the rotor ofa magneto having a driven member attached thereto, and a driving memberfor'actuating the same, of accelerating means positioned between saidmembers and adapted to be utilized under predetermined conditions, apawl pivoted in proximity to the driven member for restraining the same,manually operable means for throwing said pawl in restraining andnon-restraining position, automatic means carried by the driving memberfor throwing the pawl in restraining position and means on the drivingmember for releasing said pawl from restraining posltion to permitaccelerated movement of the rotor by said accelerating means.

9. An ignition generator having arotating element, a driven memberrigidly fastened thereto, a driving member supported on the drivenmember, accelerating means associated with the driving and drivenmembers, an end plate fastened to the generator frame and extendingoutwardly forming members, a pawl carried by said end plate, meansattached to ried by said end plate, means attached to said pawl andextending outside said plate for manually tripping the pawl intoengagement with the driven member whereby the same will be held fromrotation and energy stored in said accelerating means, means operated bythe driving member for releasing the pawl from engagement with thedriven member so the accelerating means will act on the driven memberand rotating element to rapidly restore them to normal position, and acover fitting closely over the end plate and carrying means forfrictionally engaging the driving member to keep dirt, water, etc., fromthe operating members inside the end plate.

10. An ignition generator having a rotating element, a driven memberrigidly fastened thereto, a driving member supported on the drivenmember, accelerating means associated with the driving and drivenmembers, an end plate fastened to the generator frame and extendingoutwardly forming a housing around said members, a pawl carsaid. awl andextending toward the driving mem er for tripping the pawl intoengagement with the driven member for setting the accelerating means,means carried by the driving member for automatically engaging thetripping means below a certain speed of rotation of the drivin member,land means operated by the drivlng member for releasing the pawl fromengagement with the driven member whereby the accelerating means willdrive the driven member and said rotating element rapidly forward forthe urpose de'scribedyand a cover fitting close y over the end plate andcarrying means for frictionally engaging the driving member to close theopening into tl1e== housing formed by the end plate and cover.

11. An ignition generator having a rotating element, a driven memberrigidly fastened thereto, a driving member supported 1 on the drivenmember, accelerating means associated with the drivin and drivenmembers, an end plate fastened to the generator frame and extendinoutwardly forming a housing around said members, means for causing arelative displacement between the driving and driven members and storingenergy in the accelerating means, means for releasing the displacingmeans so the ac celerating means will act on the driven member torapidly restore it to normal position for the purpose described, and acover fitting closely over the end of said housing and having means forfrictionally engaging the periphery of the driving member to close onthe driven member, accelerating means associated with the driving anddriven mem bers, an end plate fastened to the generator frame andextendingoutwardly forming a housing around said members, means forcausing a relative displacement between the driving and driven membersand storing energy in the accelerating means, means for releasing thedisplacing means so the accelerating means will act on the driven memberto rapidly restore it to normal position for the purpose described, acover for closing the end of the housin and normally closed openingsthrough the sides of the housing for the insertion of a tool to forcethe drlving and driven members off the rotating element when desired.

13. An ignition generator havin a rotating element, a driven memberrigldly fastened thereto, a driving member supported on the drivenmember, accelerating means associated with the driving and drivenmembers, means for causing a relative displacement between the drivlngand driven members and storin energy in the accelerating means, means orreleasing the displacing means so the accelerating means will act on thedriven member to rapidly restore it to normal position for the purposedescribed, and a pin carried, by the driven member adapted to be engagedby a tool to hold the rotating element from turning whereby theretaining nut for holding the driving and driven members on the rotatingelement may be removed.

14. An ignition generator having a rotating element, a driven memberrigldly fastened thereto, a driving member supported on the drivenmember, accelerating means associating with the driving and drivenmembers, an end plate fastened to the generator frame and extendingoutwardly forming a housing around said members, a pawl carried by saidend plate, means attached to said pawl. and extending outside said platefor manually tripping the pawl into engagement with the driven memberand further means attached to said pawl and extending toward the drivingmember for tripping the pawl into engagement with the driven member forsetting the accelerating means, means carried by the driving member forautomaticallyengaging the last mentioned tripping means below a certainspeed of rotation of the driving member, and means operated by thedriving member for releasing the pawl from on agement with the drivenmember whereby 516 accelerating means will drive the driven member andsaid rotating element rapidly forward for the purpose described, and acover fitting closely over the end plate and carrying means to close theopening into the houslng formed by the end plate and cover,

1 5. In a device of theclass described, the combination with the rotorof a magneto having a driven member attached thereto, of a drivingmember for actuating the same, acceleratlng means associated .with saiddriven member and connecting the same to said driving member, devices inproximity to said driven member for restraining the same, means forholding said devices in nonrestraining position, means carried by saiddriving member for throwing said devices to restraining position, meansfor releasing said devices to permit the accelerating means to act withthe rotor, and additional means for limiting the outward movement of thedrivin member carried means.-

' 16.. n a device of the class described, the combination with the rotorof a magneto having a driven member attached thereto, of a drivingmember for actuating the same, acceleratmg means associated with saiddriven member and connecting the same to said driving member, devices inproximity to said driven member for restraining the same, means forholding said devices in non-restraining position, means carried by saiddriving member for throwing said devices to restraining position, meansfor releasingsaid devices to permit the accelerating means to act withthe rotor and protective means inclosing the driving member carriedmeans to exclude extraneous matter therefrom and to limit theoutwardmovement thereof.

In witness whereof, I aflix my signature.

HENRY TiEDEMANN.

